Recently a correspondent inquired whether there was any difference between these two, and a correspondent we have gives further information. It is singular that lumbermen often find differences, though botanists fail to see distinctions. We are often told of yellow and white Poplar among the Liri-odendrons, but botanists see no differences. Something similar exists among some English timber trees. At a recent meeting of the Royal Horticultural Society Dr. Hogg showed a very interesting series of varieties of Horn beam, Birch and Hazel, known to the woodmen of Sussex,but apparently overlooked by botanists. The color of the bark was different, the habit also, while for practical purposes the distinctions were even more important as variation in the degree of brittleness, toughness, etc, accompany the differences in color. The specimens exhibited were white and red Hazel, white and red Birch, white and red Hornbeam. The Hornbeam is called in the Weald of Sussex the Beech, and the red variety the Husbeech. The true Beech (Fagus) is distinguished as the"Timber Beech." The laborers never use the red Hornbeam or Husbeech for withes because of its brittleness.

Dr. Hogg also showed twigs of Willow with galls produced by a species of cecidomyia.